Hi CAG. Here is my referral link for raise.com
They are regularly the cheapest and safest place to buy PSN/Xbox/Eshop currency. I, and many other CAGs have purchased from them without any issues. Gift cards are delivered electronically so you can use the codes right away.
If you sign up through a referral link you get $5 Raise cash to put towards your first purchase.
Combine that $5 with a promo code for even greater savings.
Here is a promo code for new customers:
10RAISEAF - $10 off purchase of $50+
This may or may not be combinable with the $5 referral cash. Even if it isn't, you will still have $5 to put towards your next purchase.
I currently maintain the Raise.com promo code thread over in the main forum. Check it out to find current promo codes and info and tips for using raise.